46*7/47=322/47
46/47*7=46/329
17/25*5/37+8/25*17/37+17/37*2/25
=1/25×1/37×(85+136+34)
=255/(25×37)
=51/185
标签：
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46*7/47=322/47
46/47*7=46/329
17/25*5/37+8/25*17/37+17/37*2/25
=1/25×1/37×(85+136+34)
=255/(25×37)
=51/185
标签：
